Specifications

enable sharing grouping
ExtremeWare XOS 10.1 Command Reference Guide 175
enable sharing grouping
enable sharing <master_port> grouping <port_list> {algorithm port-based}
Description
Enables the switch to configure static port load sharing.
Syntax Description
Default
Disabled
Usage Guidelines
Load sharing allows you to increase bandwidth and availability between switches by using a group of
ports to carry traffic in parallel between switches. The sharing algorithm allows the switch to use
multiple ports as a single logical port or a “master” port. For example, VLANs see the load-sharing
group as a single logical port. The algorithm also guarantees packet sequencing between clients.
If a port in a load-sharing group fails, traffic is redistributed to the remaining ports in the load-sharing
group. If the failed port becomes active again, traffic is redistributed to include that port.
Load sharing must be enabled on both ends of the link, or a network loop will result.
Modular switch load-sharing groups are defined according to the following rules:
• The first port in the load-sharing group is configured to be the “master” logical port. This is the
reference port used in configuration commands. It can be thought of as the logical port representing
the entire port group.
• A master port can be a member of a Spanning Tree Domain (STPD), but the other ports assigned to a
load-sharing group cannot.
• When using load sharing, you should always reference the master logical port of the load-sharing
group when configuring or viewing VLANs. VLANs configured to use other ports in the
load-sharing group will have those ports deleted from the VLAN when load sharing becomes
enabled.
• A load-sharing group can include a maximum of 16 ports.
• Groups can span multiple modules.
Load-sharing algorithms allow you to select the distribution technique used by the load-sharing group
to determine the output port selection. Algorithm selection is not intended for use in predictive traffic
engineering.
• Port-based—Uses the ingress port to determine which physical port in the load-sharing group is
used to forward traffic out of the switch.
master_port Specifies the master port for a load-sharing group.
port_list Specifies one or more ports or slots and ports to be grouped to the master
port. On a modular switch, can be a list of slots and ports. May be in the form
1, 2, 3-5, 2:5, 2:6-2:8.
algorithm Specifies sharing by port-based algorithm.